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hoffa HOFFMAN
Quiz by hoffa HOFFMAN, updated 9 months ago
hoffa HOFFMAN
Created by hoffa HOFFMAN 9 months ago
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Question 1

Question
37. On all instruction cycles, the processor accesses memory at least once, to: .
Answer
  • to fetch the instruction, and often one or more additional times, to fetch operands and/or store results
  • qwe

Question 2

Question
38. When a processor attempts to read a byte or word of memory, it firstly checks the:
Answer
  • ● Main memory
  • ● Cache
  • ● Secondary memory
  • ● Register

Question 3

Question
39. Block size is:
Answer
  • ● (How much data should be transferred from main memory to cache)
  • ● Larger block size yields more hits until probability of using newly fetched data becomes less than the probability of reusing data that have to be moved out of cache
  • ● The unit of data exchanged between cache and main memory

Question 4

Question
40. This determines which cache location the block will occupy:
Answer
  • ● replacement algorithm
  • ● locality of reference
  • ● Mapping function

Question 5

Question
41. This chooses which block to replace when a new block is to be loaded into the cache and the cache already had all slots filled with other blocks:
Answer
  • ● locality of reference
  • ● Back to nowcache size
  • ● write policy
  • ● replacement algorithm

Question 6

Question
42. If the contents of a block in the cache are altered, then it is needed to save it back to main memory before replacing it. This is called:
Answer
  • ● replacement algorithm
  • ● locality of reference
  • ● mapping function
  • ● write policy

Question 7

Question
43. Which of the following is not a technique possible for I/O operations?
Answer
  • ● Programmed I/O
  • ● Interrupt-driven I/O
  • ● Manual memory access
  • ● Direct memory access (DMA)

Question 8

Question
44. The processor issues an I/O command to a module and waits, periodically checking the status of the I/O module until it finds that the operation is complete.
Answer
  • ● Programmed I/O
  • ● Interrupt-driven I/O
  • ● Manual memory access
  • ● Direct memory access (DMA)

Question 9

Question
45. The I/O module performs the requested action and then sets the appropriate bits in the I/O status register but takes no further action to alert the processor.
Answer
  • ● Programmed I/O
  • ● Interrupt-driven I/O
  • ● Manual memory access
  • ● Direct memory access (DMA)

Question 10

Question
47. The main disadvantage of this technique: it is a time-consuming process that keeps the processor busy needlessly.
Answer
  • ● Programmed I/O
  • ● Interrupt-driven I/O
  • ● Manual memory access
  • ● Direct memory access (DMA)

Question 11

Question
48. The processor issues an I/O command to a module and then go on to some other useful work.
Answer
  • ● Programmed I/O
  • ● Interrupt-driven I/O
  • ● Manual memory access
  • ● Direct memory access (DMA)

Question 12

Question
49. The I/O module performs the requested action and alerts the processor to request service when it is ready to exchange data with the processor.
Answer
  • ● Interrupt-driven I/O
  • ● Manual memory access
  • ● Direct memory access (DMA)
  • ● Programmed I/O

Question 13

Question
51. The main disadvantage of this technique: consumes a lot of processor time, because every word of data that goes from memory to I/O module or from I/O module to memory must pass through the processor.
Answer
  • ● Programmed I/O
  • ● Interrupt-driven I/O
  • ● Manual memory access
  • ● Direct memory access (DMA)

Question 14

Question
52. The processor issues an I/O command to a separate module, by sending the type of operation (четыре вопроса в одном)read/write), the address of the I/O device, the starting location in memory for data, number of words. Then the processor continues with other work.
Answer
  • ● Direct memory access (DMA)
  • ● Manual memory access
  • ● Programmed I/O
  • ● Interrupt-driven I/O

Question 15

Question
53. The module transfers the entire block of data to/from memory without going through the processor.
Answer
  • ● Direct memory access (DMA)
  • ● Manual memory access
  • ● Programmed I/O
  • ● Interrupt-driven I/O

Question 16

Question
55. The main disadvantage of this technique: there is a competition for bus usage.
Answer
  • ● Direct memory access (DMA)
  • ● Manual memory access
  • ● Programmed I/O
  • ● Interrupt-driven I/O
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